题干

已知函数f(x)=x•sinx,有下列四个结论:

①函数f(x)的图象关于y轴对称;

②存在常数T>0,对任意的实数x,恒有f(x+T)=f(x);

③对于任意给定的正数M,都存在实数x0,使得|f(x0)|≥M;

④函数f(x)在[0,π]上的最大值是

π
2
.

其中正确结论的序号是____(请把所有正确结论的序号都填上).

上一题 下一题 0.0难度 选择题 更新时间:2017-08-17 11:53:50

答案(点此获取答案解析)

①③

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